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(Nl) Model.) J. A. ROBERTS.

v PLANING AND MATCHING MACHINE. No. 308,801. Patented Dec. 2, 1884.

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DEL JUDGE] EIIUCIEH'JEIEJ DECIDE IUD DUEIDEIEIU UEIEIUUUEIUD UUUDUUUUU UUFJEIEIEIE] l'NiTnn STATES PATENT QFFICEW JAMES A. ROBERTS. OF DETROIT, MICHIGAN, ASSIGNOR TO THE ROBERTS DUPLEX PLANING MACHINE TOOL COMPANY, OF SAME PLACE.

PLANING AND MATCHING MACHINE.

z'illiiL'IY-ICATION forming part of Letters Patent No. 308,801, dated December 2, 1884.

Application trlerl July 31, 1894.

To aZZ whom it 71mg concern Be it known that I, JAMES A. ROBERTS, of Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Improvement in Planing-Machines, of which the following is a specification.

The drawing is a plan view.

My invention consists in certain improve ments upon an invention relating to planingmachines in which two boards are simultaneously surfaced on one or both sides, tongued, and grooved, made by William M. Dwight, of Detroit, and now the subject of a pending ap plication for a patent; and it consists in, a different arrangement of the guides, by which two boards can be at the same time brought into the proper position.

The planing-machine, as to its frame and bed, is in all respects similar to any ordinary planer now -in use adapted to surface one or both sides of a board, and therefore needs no detailed description.

A A represent two guides, somewhat less in height than the thickness of the lumber to be V operated upon, bolted to the bed of the ma chine at each side thereof, and running, preferably, the whole length of the bed, each guide being broken at the point where the grooving-knife on that side of the machine is set.

G 0 represent cutter-cylinders, one above and one below the bed of the machine, and b I) represent T-shaped grooves on the sides thereof, by which the knives are fastened by means of bolts to the cylinder, as explained in my Patent No. 294,914, dated March 11, 1884; and B B represent caps by which the tonguing-knives a a are held on the cylinders O O, as explained in my said patent. The arrangement of the surfacing and tonguing knives on the cutter-cylinders, which are rectangular, is that the surfacingknives are held on two opposite sides thereof, and the tonguing-knives on the othertwo sides, so that the cylinder is balanced.

G represents a pressure-roll, and G G represent two pressure-rolls, each of which is broken in the center, so as to form two rolls capable of independent vertical motion. The

(No model.)

outer end of each of these rolls is journaled in a box, 9, and the inner end in a box, N, and each roll has a weighted lever, K, to force it down, but this feature will be made the subject of a separate application for a patent. All the pressure-rolls, or as many of them as desired, are driven by gearing on their ends in the ordinary manner.

D D represent two grooving-knives of the ordinary construction and driven in the usual manner, set on opposite sides of the machine, so that each will operate on the edge of aboard when the same is in contact with the guide A on that side.

To hold the outer edges of the boards to be operated upon against the guides A A, I have set said guides at an angle with the longitudinal center of the bed of the machine, while the rolls are at right angles with said longitudinal center, so that the action of the rolls tending to feed the boards parallel with said longitudinal center is resisted by the inclined guides A A, and the outer edges of the boards are thus made to hug said guides closely. The guides A A are farthest apart at the end of the machinewhere the lumber enters, and c011- verge toward the other end, as shown in the drawing. Instead of this arrangement, guiderolls may be bolted to the bed of the machine so as to come in contact with the inner edges of the boards and force the outer edges there of against the guides A A, or the two arrangements may be used together; but this feature is the invention of William M. Dwight, and is fully set-forth in his pending application.

In the operation of my invention the tonguingknives a a are fastened to their respective cylinders at such a distance from the guide A nearest each knife that said knife will partially form a tongue of proper width on the inner edge of a board whose outer edge is pressed against the guide A. By this arrangement the two tonguing-knives a a will each form the upper half of the tongue on each of two boards simultaneously fed through the machine, so that the four knives aa will form two complete tongues. At the same time the surfacing-knives on the two cylinders will surface both sides of two boards, and each groov ing-knife D will groove the outer edge of one scribed, adapted to feed two boards through 20 board, so that the machine will simultaneously plane, tongue, and groove two boards.

It is evident that the position ofthe tonguingknives can be changed to suit any width of boards.

l/Vhat Iclaim as my invention, and desire to secure by Letters Patent, is

1. In a planing-machine, the combination of two cutter-cylinders, each carryingtwo adjustable tonguing-knives working in a vertical plane, two grooving-cutters placed on opposite sides of the machine and working in a horizontal plane, two guides secured to the bed of the machine, on opposite sides thereof, converging toward the delivery end of the machine, and each adapted to guide the outer edge of a board to one of the grooving-cutters, and mechanism, substantially as dethe machine and crowd their outer edges against said guides, substantially as described. 2. In a planing-machine, the combination of the upper and lower cutter-cylinders, O 0, each carrying the adjustable tonguing-knives at a, working in a vertical plane, the feed and pressure rolls G G, the two grooving-cutters D D on opposite sides of the machine, working in a horizontal plane, and the converging guides A A, secured to the bed of the machine, on opposite sides thereof, respectively, for guiding the outer edges of two boards to the side grooving cutters, substantially as described.

J AMES A. ROBERTS. XVitnesses:

OYRUs E. LOTHROP, SUMNER CoLLINs. 

